article: I hurried into the store to get Christmas gifts. Suddenly, I saw a little boy holding a lovely doll. He kept touching her hair. I watched him turn to a woman and say, "Are you sure I don't have enough money?" She said yes and told the boy not to go anywhere before she came back. Then she left.
  The boy continued to hold the doll. I asked the boy who the doll was for. He said, "It's the doll that my sister wanted so badly for Christmas. She just knew that Santa would bring it." I told him that Santa was going to bring it. He said, "No, Santa can't go where my sister is. I have to give the doll to my mom to take it to her."
  I asked him where his sister was. He looked at me sadly and said, "She's gone to heaven. My daddy said that Mom was going to be there with her." My heart nearly stopped beating. Then the boy said, "I told my daddy to tell her not to go there until I got back." He took out some pictures of him and said, "I want my mom to take these with her so she'll never forget me. I love my mom so much that I wish she didn't have to leave me, but Daddy said that she needed to be with my sister."
  The boy lowered his head. While he was not looking, I reached into my purse and asked him, "Shall we count that money again?" He grew excited and said, "Yes, I just know it has to be enough." So I put my money with his and we began to count it. He said, "Thank you for giving me enough money." He continued, "I just asked God to give me enough money to buy this doll, and he heard my _ ."
  Soon the woman came back and I left. I remembered a story I had read in the newspaper several days earlier about a drunk driver who hit a car. A little girl was killed and her mother was in serious condition. Two days later, I read the news that the mother had died.
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question: What happened to the boy?
options: His sister died in a car accident. His father left him with his mother. His father was killed by a drunk driver. His mother left him with his sister.